On your iPhone, iPad, and iPod touch
- Go to Settings > [your name].
- Tap iCloud.
- Swipe to turn on iCloud Drive.
You can find your iCloud Drive files in the Files app.
If you're using iOS 10 or iOS 9, tap Settings > iCloud > iCloud Drive. Turn on iCloud Drive, and tap Show on Home Screen. Then you'll find your files in the iCloud Drive app.